[heinrich773]

I'm not sure of the cause, but one solution for the scrambled graphics I found is to change the KDM Theme from SUSE to something else, like Oxygen. I've had to do this in /etc/sysconifig Editor under Desktop, then Display Manager, then DISPLAYMANAGER_KDM_THEME.

I also change it in System Settings, Login Manager GUI style, as this value doesn't change the KDM_THEME setting. I've tried Oxygen and Bespin and both eliminate the garbled textures from the login screen.